Submersible pump in gas station is developed from explosion-proof shielded motor produced by Franklin Company in the 1950s, and its core technology is shielded motor. The submersible pump in Franklin Company's gas station is commonly known as "blue brand" or "blue jacket". American "Red Jacket" submersible pump is a world-famous brand, but the shielded motor used by it is also made by Franklin Company (since the end of 20 12, Franklin Company terminated the supply contract with the red jacket manufacturer Vidrut Company).
2. Comparison between submersible pump and tank car self-priming pump in gas station.
Using the principle of positive pressure propulsion, the submersible pump fundamentally eliminates the phenomenon of gas resistance, and completely solves the problems of oil shortage (gas-liquid two-phase), environmental pollution and even no oil that the self-priming pump cannot solve under the conditions of high temperature environment, high lift and long distance. In addition, the submersible pump in the gas station can carry multiple guns (4-8 guns) in one pump, and the self-priming pump can only carry one gun in one pump, so the submersible pump simplifies the oil pipeline, brings great convenience to installation and maintenance, and has the highest cost performance. GB 50 1 56-2012 (Code for Design and Construction of Automobile Refueling and Filling Stations), which was implemented on March 20 13, clearly pointed out that "submersible pump refueling technology ... is the development direction of China gas station".
3. Selection method of submersible pump in gas station
The selection of submersible pump should first choose the rated voltage of submersible pump according to the power supply voltage of the place of use. If conditions permit, try to choose a three-phase submersible pump with a rated voltage of 380 volts, because the 380-volt three-phase submersible pump motor with the same power has less loss, higher efficiency and lower heat generation than the 220-volt single-phase submersible pump motor. The 220v submersible pump must be equipped with a capacitor. The life of the capacitor is much shorter than that of the submersible pump, so the replacement is inevitable. In addition, the most suitable and efficient submersible pump should be selected according to the tank diameter, pipe diameter, pipe length, head and flow rate of the oil tank. Generally, it is necessary to select various series of submersible pumps according to the performance curve provided by the manufacturer's samples, or entrust the manufacturer to calculate and select the type.